Forgiveness, that'd be my advice. And then cut him out of your life.

Your anger is intense and I sympathize but I think you know revenge is not going to make anything better. If you demonstrate patience and forgiveness with him, you will win.

In terms of dealing with your mother, don't jump too far ahead, she may just be acting out and her threats might be empty. Also there is still time for her to see the truth in that you did not steal anything. Do you think that's possible?